Reverted: Revert "ci: use termux/upload-release-actions to attach debug builds to new releases"

This reverts commit 2ac7fd1e565872d10b91157022485c13ab179524.

Do not use `upload-release-action` for uploading artifacts and generating checksum and instead keep using standard `sha256sum` and internal github tools. `upload-release-action` also generates checksum in the wrong format, check https://github.com/termux/termux-app/pull/3241#discussion_r1106019790.